Yuan Zhao

Dr. Yuan Zhao

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Academic Career Length

6Years (2021-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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19 April 2023 in Materials
Verified
Journal Article
Open access
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QZQiaolie Zheng
Qiaolie Zheng
Bin WangBin Wang
Bin Wang
XLXiping Li
Xiping Li
XXXiangde Xiao
Xiangde Xiao
HJHuimei Jin
Huimei Jin
YZYuan Zhao
Yuan Zhao
Basalt fibers (BFs) are environmentally friendly materials characterized by high strength and good wear resistance, and thus are popular candidates for reinforcing polymers. Herein, polyamide 6 (PA 6), BFs, and the styrene–ethylene–butylene–styrene (SEBS) copolymer were melt compounded sequentially to prepare fiber-reinforced PA 6-based composites. The results showed improved mechanical and tribological performances via the incorporation of BFs and SEBS into PA 6. Compared to neat PA 6, an average 83% increase in notched impact strength was achieved for the PA 6/SEBS/BF composites, which is mainly due to the good miscibility between SEBS and PA 6. The tensile strength of the composites, however, was only increased moderately, since the weak interfacial adhesion was not sufficiently efficient to transfer the load from the PA 6 matrix to the BFs. Interestingly, the wear rates of both the PA 6/SEBS blend and the PA 6/SEBS/BF composites were obviously lower than those of the neat PA 6. The PA 6/SEBS/BF composite with 10 wt.% of the BFs exhibited the lowest wear rate of 2.7 × 10−5 mm3/N·m, which was decreased by 95% compared to that of the neat PA 6. The facilitation of forming tribo-film with SEBS and the naturally good wear resistance of the BFs were responsible for the largely decreased wear rate. Moreover, the incorporation of SEBS and BFs into the PA 6 matrix transformed the wear mechanism from adhesive wear to abrasive wear.
2 October 2021 in Materials
Verified
Journal Article
Open access
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JZJipeng Zhang
Jipeng Zhang
YWYue Wang
Yue Wang
WYWen Yang
Wen Yang
YZYuan Zhao
Yuan Zhao
Mechanical joints are commonly required in structures made of fiber metal laminate (FML), which pose a threat due to multi-site stress concentrations at rivet or bolt holes. Thus, for a reasonably designed FML joint, it is essential to characterize the failure mechanism of multiple-hole FML; however, little information about this has been found in open literature. In the present work, influences of hole arrangement and loading strategy (on-axis or off-axis) on the failure mechanism of multiple-hole FML were investigated, by performing finite element analyses and energy dissipation analyses with elastoplastic progressive damage models that took curing stress into account. Six types of specimens with holes arranged in parallel and staggered forms were designed, whose geometrical parameters were in strict accordance with those specified for composites joints. It indicated that the stress distribution, gross/net notched strength, critical fracture path, and damage evaluation process were only slightly influenced by the hole number and hole arrangement. On the other hand, they were strongly influenced by the loading strategy, due to the transition of failure domination. Results presented here can provide evidence for introducing design regulations of composite joints into the more hybrid FML, and for reasonably determining its multiple-hole strength merely based on the sing-hole specimen.
1 April 2026 in Journal of Physics: Conference Series
Verified
Conference Paper
Open access
WSWenwen Sang
Wenwen Sang
PYPengfei Yang
Pengfei Yang
LSLei Sun
Lei Sun
YMYongkun Ma
Yongkun Ma
YZYuan Zhao
Yuan Zhao
JZJiazhen Zhang
Jiazhen Zhang
To address the difficulties in observing surface cracks during fretting fatigue of tenon structures and the irregular geometry of the friction contact zone in the pad, this study developed a novel fretting fatigue test fixture. Utilizing this fixture, fretting fatigue experiments were systematically conducted, and a corresponding finite element simulation model was established. Through fretting fatigue tests on typical dovetail tenon specimens combined with digital image correlation (DIC) technology, we found that fatigue cracks predominantly initiated at the edge of the contact surface. The contact interface remained intact but exhibited accumulated wear debris, demonstrating a distinct fretting fatigue failure mechanism. The experimental results confirmed that the proposed testing apparatus fully meets the evaluation requirements for fretting fatigue in dovetail tenon structures. This study provides high-precision experimental data, offering valuable insights into fretting damage mechanisms and supporting the development of fatigue life prediction models.
27 November 2024 in Metals
Verified
Journal Article
Open access
PDF file
TZTao Zang
Tao Zang
YGYing Gao
Ying Gao
YZYuan Zhao
Yuan Zhao
PYPengfei Yang
Pengfei Yang
SEShiju E
Shiju E
JZJiazhen Zhang
Jiazhen Zhang
In this study, the fatigue crack initiation and growth behaviors of an additively manufactured (AM) Ti-6AI-4V alloy were investigated, and its prospect for fatigue applications was evaluated. The AM specimens were first fabricated by selective laser melting (SLM) and then underwent a cycle of annealing at 800 °C for 2 h and hot isostatic pressing (HIP) treatment at 920 °C/150 MPa/3 h followed by surface machining. Prefabricated spherical defects with different diameters (1.0 mm and 2.0 mm) were introduced to examine the efficacy of HIP treatment for eliminating the built defects. Both fracture morphology and microstructure were characterized to reveal the failure mechanism of these tested specimens. The results suggest that both the fatigue lives and fatigue crack growth resistances of most SLM+HIP-processed specimens are much higher than those of traditional wrought material, thus highlighting that the AM Ti-6AI-4V alloy can be a better candidate for future fatigue applications. However, due to the large variability in fatigue performance, the current SLM+HIP-processed Ti-6Al-4V alloy still cannot meet the demand for high safety and reliability.
1 April 2026 in Journal of Physics: Conference Series
Verified
Conference Paper
Open access
XCXing Chen
Xing Chen
JSJiale Sun
Jiale Sun
YZYuan Zhao
Yuan Zhao
PYPengfei Yang
Pengfei Yang
WHWei He
Wei He
JZJiazhen Zhang
Jiazhen Zhang
This paper improves the buckling resistance of carbon fiber composite honeycomb structure by geometric optimization, and designs a curved wall-carbon fiber reinforced resin (CFRP) honeycomb to replace the traditional quadrilateral straight wall with a curved arc wall. Preparation of a honeycomb structure using the winding and splicing method. The deformation and failure modes of curved-walled CFRP honeycomb under out-of-plane compression were studied through a combination of theory and experiment. The analysis results indicate that the honeycomb-shaped curved wall design can effectively improve the structural buckling resistance, and is positively correlated with the structural curvature and wall thickness t, and negatively correlated with the curved wall chord length L. The failure mechanism boundary of different combinations of layer angles is concentrated around t/L=1.2. The energy absorption capacity increases by 12% for every increase in the semi-central angle of the curved wall. Finally, the experimental results were added to the Ashby material performance selection chart, which showed a 13% increase in strength compared to traditional hexagonal honeycomb at low density and a 17% increase in strength compared to Nomex honeycomb.